Provided are an anti-blood-backflow time-controllable filter for a medical infusion set, and a medical infusion set, the filter comprising a drum (1), and also comprising a reservoir (5) disposed inside the drum (1) and storing residual drug solution used for preventing blood backflow, and an infusion channel used for conventional infusion said reservoir (5) has one of two configurations configuration 1: the reservoir (5) is provided with at least one through-hole (51), each of the through-holes (51) having a flow-restricting passageway (61) to enable the residual drug solution to drip by means of the flow-restricting passageway (61) at the anti-blood-backflow speed configuration 2: the reservoir (5) is provided with at least one through-hole (51), a flow-restricting tube (6) is snap-fittingly provided in each of the through-holes (51), and the flow-restricting tube (6) has a hollow and flow-restricting passageway (61), enabling the residual drug solution to drip by means of the flow-restricting passageway (61) at the anti-blood-backflow speed. The present configuration ensures that sufficient time is provided for the to-be-infused drug solution in the reservoir (5) of the infusion set to pass through the flow-restricting passageway (61) and drip slowly to overcome the diffused venous blood pressure, thus guaranteeing enough time during infusion to prevent backflow of the blood.La présente invention concerne un filtre contrôlable dans le temps anti-reflux de sang pour un ensemble de perfusion médicale, et un ensemble de perfusion médicale, le filtre comprenant un tambour (1) et comprenant également un réservoir (5) disposé à lintérieur du tambour (1) et stockant une solution de médicament résiduel utilisée pour prévenir un reflux de sang, et un canal de perfusion utilisé pour une perfusion classique ledit réservoir (5) a une parmi deux configurations configuration 1 : le réservoir (5) comprend au moins un trou traversant (51), chacun des trous traversants (51) aya
